Fuel injector on cylinder 4 is partially stuck open or leaking, delivering excess fuel; Contaminated or clogged injector nozzle causing an abnormal spray pattern; Wiring harness or connector issue at the cylinder 4 injector, such as chafing or corrosion; Faulty engine control module injector driver circuit for that cylinder; Low fuel pressure or a restricted fuel filter altering injector behavior; Internal mechanical wear in the injector affecting its offset learning

DTC codes / P2Cxx · Hybrid propulsion / P2C58

P2C58Cylinder 4 Fuel Injector B Offset Learning At Min Limit

Q: What does code P2C58 mean?

Cylinder 4 Fuel Injector B Offset Learning At Min Limit. P2C58 indicates that the engine control module has learned a fuel injector offset correction for cylinder 4 that has reached its minimum allowable limit, meaning the module can no longer compensate for the injector's flow characteristics. The computer detected that the learned offset value for injector B on cylinder 4 is clamped at the bottom of its adaptive range, which typically points to an injector that is flowing more fuel than expected or a related circuit issue.

P2C58 indicates that the engine control module has learned a fuel injector offset correction for cylinder 4 that has reached its minimum allowable limit, meaning the module can no longer compensate for the injector's flow characteristics. The computer detected that the learned offset value for injector B on cylinder 4 is clamped at the bottom of its adaptive range, which typically points to an injector that is flowing more fuel than expected or a related circuit issue.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

Illuminated check engine light, often with no other noticeable symptoms
Rough idle or misfire sensation, especially when the engine is cold
Slight decrease in fuel economy or black smoke from the exhaust
Hesitation or stumble during acceleration
Elevated hydrocarbon emissions or a fuel smell

Common causes, most likely first

Fuel injector on cylinder 4 is partially stuck open or leaking, delivering excess fuel
Contaminated or clogged injector nozzle causing an abnormal spray pattern
Wiring harness or connector issue at the cylinder 4 injector, such as chafing or corrosion
Faulty engine control module injector driver circuit for that cylinder
Low fuel pressure or a restricted fuel filter altering injector behavior
Internal mechanical wear in the injector affecting its offset learning

How to diagnose and fix it

Connect a scan tool and record the freeze-frame data and injector offset learning values for all cylinders to compare
Inspect the cylinder 4 injector connector and wiring for damage, corrosion, or loose pins
Perform a fuel injector balance test or cylinder contribution test to isolate the faulty injector
Check fuel pressure and volume against the manufacturer's specification
Swap the cylinder 4 injector with a known-good injector from another cylinder and see if the code follows
If the injector is faulty, replace it and clear the adaptive learning so the module can relearn the offset
Verify repair by road-testing under the conditions that originally set the code and confirming the offset value returns to the normal range

What the offset learning limit really tells you

A min-limit offset code often means the injector is flowing more fuel than the module can correct for, which is the opposite of a clogged injector that flows less.
Many technicians replace the injector immediately, but a poor electrical connection at the injector can cause the same learned offset to hit the limit.
This code can be set by a fuel pressure regulator that is bleeding pressure into the intake, causing rich running that the module tries to offset.
After replacing the injector, the adaptive learning must be reset with a scan tool; otherwise the old offset value remains stored and the code may return.
A dirty mass airflow sensor or a vacuum leak can skew fuel trims and indirectly push the injector offset learning to its limit, so check those before condemning the injector.

Can I keep driving with P2C58?

You can usually continue driving to a repair shop, but avoid heavy acceleration or towing until the fault is diagnosed. Prolonged driving with a rich-running cylinder can damage the catalytic converter and spark plugs, so schedule service soon.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.